EP 0208788 A4 19880427 - SPEED CONTROL SYSTEM FOR SERVO MOTORS.
Title (en)
SPEED CONTROL SYSTEM FOR SERVO MOTORS.
Title (de)
GESCHWINDIGKEITSREGELSYSTEM FÜR SERVOMOTOREN.
Title (fr)
SYSTEME REGULATEUR DE VITESSE POUR SERVOMOTEURS.
Publication
Application
Priority
JP 370285 A 19850112
Abstract (en)
[origin: WO8604194A1] In a speed control system for servo motors, the speed is controlled by using an observer which obtains a speed detect value while presuming the load torque of the motor. Even in a low-speed region of the motor where the resolving power of a rotary encoder is not sufficiently high, the resolving power is compensated to increase the speed detecting precision in the low-speed region. In a high-speed region of the motor, the speed processing is performed by the output of the rotary encoder by taking the processing time of CPU into consideration. Namely, to use or not to use the observer that obtains a presumed value of speed is determined depending upon the speed of the motor.
IPC 1-7
IPC 8 full level
H02P 29/00 (2016.01); G05B 19/23 (2006.01); G05B 19/416 (2006.01)
CPC (source: EP US)
G05B 19/237 (2013.01 - EP US); G05B 19/416 (2013.01 - EP US); H02P 23/16 (2016.02 - EP US); G05B 2219/33075 (2013.01 - EP US); G05B 2219/37344 (2013.01 - EP US)
Citation (search report)
No relevant documents have been disclosed.
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8604194 A1 19860717; EP 0208788 A1 19870121; EP 0208788 A4 19880427; JP S61164481 A 19860725; US 4680518 A 19870714
DOCDB simple family (application)
JP 8600010 W 19860111; EP 86900635 A 19860111; JP 370285 A 19850112; US 90870186 A 19860908